Open-hearth furnace.



R. HUKWQRTH.

OPEN HARTH FURNACE.

APPLlCArmN mln MNE 8. 191;

1,176,744. Patented Mar. 2a, 1916.

if A TTUHNE Y UNITED STATES PATENT oEEIeE.

REGNIER EICKWORTH, OF DORTMUND, GERMANY.

OPN-HEARTH FURNACE.

Application filed June 8, 1915.

To all whom it may concern:

Be it known that I, REGNIER EICKWORTH, of 49 Kaiser-l/Vlhelm Allee, Dortmund, in the Kingdom of Prussia, German Empire civil engineer, have invented certain new and useful Improvements in Open-Hearth Furnaces, of which the following is a specitication.

My invention relates to open hearth furnaces and its particular object is to provide an arrangement for lengthening the life of the furnace ends which are known to be posed to early destruct-ion b v the action of the hot gases on the exhaust end.

According to myv invention channels connected with a compressed air conduit are arranged in the crowns of the furnace ends. The compressed air passing from the conduit into the channels exerts a cooling action upon the crown even before passing around the crown into the exhaust channels where their cooling effect is greatest. llowever, as it is undesirable to feed cold air into the inlet end on account of the inevitable chilling of the metal resulting therefrom, the compressed air conduit is provided with a reversing gear actuated together with the reversing gear of the furnace so as to cause a greater quantity of compressed air to passl through the exhaust end whereas the inlet end receives little or no cooling air at all. The air reversing gear is preferably coupled with the furnace reversing gear.

ln the drawings accompanying this specification a preferred Vform of an arrangement according to mv invention is shown as adapted to an open hearth furnace of well known construction.

[figure l is a vertical longitudinal section. Fig. is a horizontal longitudinal section. of a furnace `embodying the invention on line Q of Fig. Il. Fig il is a vertical cross section on line. Ill-l of Fig. 2.

n and o are the gas'tlues of the furnace.

c and (l are' compressed air channels arranged ahove the. gas flues.

'l'. 1. are compressed air channels arranged in the crown of the furnace. at opposite ends thereof ahove the, Combustion channels c, (1. 7.'. on hoth sides of the gas lues. 'lhese combustion channels have downward vertical extensions c', f,fg', L at their outer ends.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Serial No. 32,834.

All the air channels are connected to a compressed air conduit consist-ing of a main pipe n and two branch pipes 0 and p, each end of the furnace being thus provided with a compressed air conduit of its own. A reversing valve g of any well known construction inserted between the branch conduits o and p serves for V"governing the air feed to one or the other furnace end. B v actuating the reversing valve accordingly either no compresse l air at all is allowed to pass through the gas inlet channel.7 or the quantity of air admitted is kept low enough to cool the crown without impairing the qualit)7 of the metal on the hearth r.

The compressed air reversing gear f] may he of an v suitable type such as an ordinar7 valve or slide, a double valve, a three wav cock and so on.

.ln the position of parts assumed in Fig. l the exhaust is on the left hand side. The gas enters through flue the regenerated air through channels y'/ and z.. The valveI l] is adjusted in such a position as to allow the compressed air from the main pipe 11. to passonlv into the branch conduit 0 and from there through the exhaust end channel c into the exhaust flue n. The air passing through the side channelsl f' and Z' cools the hrick work covering the channels c and /l thence passes through the apertures provided at the end of the air channels into the furnace and leavesl the latter through the channelsI c and which serve as supplementar v exhausts. rlhc parts of the exhaust end of thc furnace are thus cooled by the air currents4 passing through said compress-ed air channels. while the metal in the hearth is not affected thcleliv. v"hell the current of thc furnace reversed. as usual in this class of furnaces. the inlet end becoming the exhaust end and the exhaust end the inlet end` the valve f/ is reversed and the compressed air current if: cut off from the pipe o leading into the left hand end of the furnace and permitted to low through thc pipe to the air channels at the right hand end ofthe furnace.

l claim:

An open hearth furnace ha\ ing a hearth, flues at opposite ends thereof adapted to serve alternately as fuel suppl)v and exhaust tlues, combustion channels disposed in the crown Of the tur-nace and Connected With as my invention I have signed my name n. sind flues, compressed-mr coohng channels presence of two sulmcrlblng wltnesses. dlsposed 1n sald crown over sald channels {tui-Y 4") ",.7 f" and connected therewith for discharge RLLBILL' 131th OHMI [1 5'] 5 thereinto, and means for supplying com- W'itnesses:

pressed-air t0 said cooling channels. HELEN Numan,

In testimony, that I claim4 the foregoing ALBERT N Ulfn. 

